Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Marble Blast Gold is a 3D adventure game. It was pre-installed on some Apple Inc. computers like the iMac and iBook. It is also available for Windows operating systems as well as various Linux distributions. Marble Blast Gold was also released for the Xbox, which featured several levels to replace others due to different gameplay mechanics. The sequel, Marble Blast Ultra was released a few years later for the Xbox 360 platform, and features improved graphics and new features. The basic gameplay involves rolling a marble from the start pad to the end pad, while avoiding the hazards along the way. On some levels, there is a Qualify time that the player must meet in order to move on to the next level. Most levels also require collecting a set number of gems along the way. There are 100 levels in all, divided by difficulty: 24 beginner, 24 intermediate, and 52 advanced.